Biology, 26.11.2019 05:31, jasminelynn135owmyj1
In one experiment, scientists raised mice in germ-free conditions so the mice lacked intestinal microbes. the mice were fed a low-fat diet rich in the complex plant polysaccharides, such as cellulose, that are often called fiber.
when the mice were 12 weeks old, the scientists transplanted the microbial community from the intestine of a single "donor" mouse into all of the germ-free mice. then they divided the mice randomly into two groups and fed each group a different diet.
• group 1 (the control group) continued to eat a low-fat, high-fiber diet.
• group 2 (the experimental group) ate a high-fat, high-sugar diet.
place the following experimental factors below in the correct corresponding place in the chart below.
1. age of the mice
2. diet
3. change in the body fat
4. final composition of the micriboal community
5. initial composition of the micriboal community
6. weight gain
a) factor being tested (indeendent variable)
b) factors controlled (kept consistent)
c) factors to be measured (dependent variable)
Answers: 1
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Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?
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